What percentage of rotor RPM must be achieved before the mast moment indication is displayed?

• A. Above 60%
• B. Above 50%
• C. Above 70%
• D. Above 80%

Answer: (C)

The correct answer indicates that a specific level of rotor RPM, specifically above 70%, is necessary before the mast moment indication can be effectively displayed. This is crucial in lifting operations as the mast moment is a measure of the structural forces acting on the lift mechanism, which directly correlates to safe lifting practices.

Achieving the required rotor RPM ensures that the system is operating within its designed performance parameters, allowing for accurate and reliable readings of mast moment. If the rotor is below this threshold, the system may not provide sufficient data to make informed decisions about load handling, which can lead to unsafe conditions.

Maintaining rotor RPM above this critical point is essential for optimizing performance and ensuring safety when lifting loads. Additionally, operational protocols generally include checks of rotor speed to assure that the equipment is functioning as intended before engaging in lifting activities.